Question

Marta is making a flag with the given dimensions. The perimeter of the flag is 100 inches. How much material, in square inches, is needed to make the flag?

?? square inches

If the material costs $0.15 per square inch, how much will Marta spend on materials to make the flag?

$??

Answer 1

She would need 360 square inches of fabric, we know this by using the heron's formula P =100, S = 50

A = (50(50-41)(50-41)(50-18))^.5

A = (50(9^2)(32))^.5

A = 9(50(32))^.5

A = 9(1600)^.5

A = 9*40

A = 360

360*0.15 per piece equals $54

Answers:

360, 54